JPH11277982A - Electronic blackboard apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic blackboard apparatus for erasing an image by effectively removing the image drawn by an image forming substance such as a hot-melt ink or the like in the state that an adhesive force is strong. SOLUTION: The electronic blackboard apparatus 1 comprises an image erasing mechanism 14 arranged near a screen 3 on a driving roller 10 part for conveying the screen 3. The mechanism 14 contains a cutter member 21 and a cutting edge cleaning member 22 in a case 20. A recovery container 23 is mounted at a lower end of the case 20. The member 21 has a spring material spirally arranged on an outer periphery of a cylindrical mandrel. In the mechanism 14, at the time of erasing an image, the member 21 is rotatably driven, and the roller 10 part is brought into contact with a surface of the screen 3. Accordingly, the mechanism 14 can effectively remove an image forming substance 24 of the image on the screen 3 by the rotating material 21, and effectively erases the image of the screen 3. The member 22 is brought into contact with the member 21 at a suitable time, and the substance 24 adhered to the member 21 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard device, and more particularly, to an electronic blackboard device capable of appropriately erasing an image having strong adhesion to a screen.

[0002]

2. Description of the Related Art In a conference or the like, an image drawing mechanism for drawing an image on a screen based on input data from an information processing device such as a personal computer or a scanner or the like is provided. An electronic blackboard device having an erasing mechanism for erasing a drawn image has been used. As an image drawing mechanism, drawing using the same ink as a felt pen (Japanese Utility Model Laid-Open No. 5-39065, Japanese Unexamined Patent Publication No. Hei 9-99697), drawing by electrostatic recording method
0, JP-A-5-32093), and drawing by an ink jet recording method (JP-A-8-156490).
Japanese Patent Application Laid-Open No. 8-156491) and various other drawing methods have been conventionally proposed.

In such an electronic blackboard device, documents, tables, graphs, and the like created by a personal computer or the like are input to the electronic blackboard device via an interface, and drawn on a screen by an image drawing mechanism of the electronic blackboard device. For example, when a table or graph format is created in advance by an image drawing mechanism, and characters and numbers etc. presented at a meeting are input via a personal computer or the like, the input characters and numbers are formatted. Draw them on the screen by incorporating them into tables and graphs.

In a meeting using such an electronic blackboard device, if necessary, all or a part of the image drawn on the screen is deleted, but the image drawn on the screen is deleted. As a method, a conventional electronic blackboard device employs an erasing mechanism using a normal blackboard eraser (Japanese Utility Model No.
JP-A-39065, JP-A-5-70070, JP-A-5-241479), an erasing mechanism using a felt or the like (see 5-32093), and an erasing mechanism using a cloth or sponge ( Japanese Patent Application Laid-Open No. 8-156490 is common, and a roller-type erasing mechanism has also been proposed (see Japanese Patent Application Laid-Open No. 8-156491).

There has also been proposed an electronic blackboard apparatus having an erasing mechanism for erasing an image on the screen by bringing the edge of the blade into contact with the screen (Japanese Patent Laid-Open No. 5-5).
No. 97). This electronic blackboard device erases an image only by pressing the blade against the screen when erasing the image.

[0006]

However, in such a conventional electronic blackboard device, there is still a need for improvement in improving the usability of the electronic blackboard device.

That is, in the conventional electronic blackboard device, as an erasing mechanism for erasing an image drawn on a screen, an erasing mechanism using a normal erasing of a blackboard (Japanese Utility Model Laid-Open No. 5-39)
No. 065, Japanese Utility Model Laid-Open No. 5-700070, Japanese Unexamined Patent Application Publication No.
Generally, an erasing mechanism using a felt or the like (see Japanese Patent Application Laid-Open No. 5-32093) and an erasing mechanism using a cloth or a sponge (see Japanese Patent Application Laid-Open No. 8-156490) are common. In the image method of (1), the erasability of the image is poor, and the erasing mechanism using the blade (refer to Japanese Patent Application Laid-Open No. 597/1997) only has to press the blade against the screen surface at the end. ,
In a conventional electronic blackboard device, when an image is formed on a screen by an image drawing mechanism, the image forming substance is drawn with reduced adhesion (fixing property) to the screen.

[0008] However, if the adhesion of the image to the screen is weak, a part of the image is lost during or after drawing, deteriorating the image quality, or the image forming substance adheres to the clothes or the like, and the clothes or the like are damaged. In order to improve the usability of the electronic blackboard device, there was a need for improvement. If the adhesion of the image by the image drawing mechanism is increased in order to solve such a problem, there is a problem that the conventional erasing mechanism cannot erase a sufficiently drawn image.

In a meeting or the like using an electronic blackboard device, an image created by an image drawing mechanism is sometimes left behind, and only an image drawn by hand by a user is erased by blackboard eraser or the like. However, in such a case, if the adhesion of the image drawn by the image drawing mechanism is weak, both the image drawn by the image drawing mechanism and the image drawn by hand are erased by a blackboard eraser or the like. There was a problem that the usability of the blackboard device was poor.

Although a roller-type erasing mechanism has been proposed (see Japanese Patent Application Laid-Open No. 8-156491), the material and configuration of the roller are not clear, and the above-mentioned problem is not properly solved. is not.

According to the first aspect of the present invention, an image erasing means for erasing an image on a screen includes a roller-shaped blade member having a helical blade. And the blade member is rotated at a speed different from the moving speed of the screen at a contact position with the screen to remove an image forming substance of an image drawn on the screen. Even if an image with a sufficiently strong adhesive force is drawn by an image drawing mechanism using electrostatic recording using toner or ink jet recording using hot melt ink, the image is appropriately and reliably drawn on the screen. It is an object of the present invention to provide an electronic blackboard device capable of removing an image forming substance and reliably deleting an image on a screen.

According to a second aspect of the present invention, in the image erasing means,
By providing a blade cleaning means for removing at least the image forming substance adhered to the spiral blade among the blade members, the image forming substance adhered to the blade member is removed, the blade member is always cleaned, and the screen is formed by the blade member. In addition to improving the ability to remove the above-mentioned image-forming substance, preventing the image-forming substance from re-adhering to the screen from the blade member, the image drawn on the screen is more appropriately and reliably erased. It is an object of the present invention to provide an electronic blackboard device capable of doing so.

According to a third aspect of the present invention, an image forming substance adhered to the blade member is removed by using a brush member made of resin or metal as the blade edge cleaning means, so that the blade member is always cleaned, and the blade member is constantly cleaned. By further improving the ability to remove the image-forming substance on the screen, and preventing re-adhesion of the image-forming substance from the blade member to the screen, more appropriately and reliably, the image drawn on the screen. It is an object of the present invention to provide an electronic blackboard device that can be erased.

According to a fourth aspect of the present invention, there is provided an image erasing means for erasing an image on a screen, wherein the image erasing means has a blade member made of metal or resin and arranged in a direction perpendicular to the moving direction of the screen. Contacting the blade member with the screen, and vibrating the blade member at a predetermined magnitude and a predetermined frequency in the moving direction and the anti-moving direction of the screen to form an image forming substance of an image drawn on the screen. By removing
Even if an image with strong adhesion is drawn by an image drawing mechanism using electrostatic recording using toner or ink jet recording using hot melt ink, it is appropriately and reliably drawn on the screen with a simple configuration. Inexpensive that removes the image forming substance that has been removed, prevents the image forming substance from sticking to the blade due to vibration, prevents the image forming substance from re-adhering to the screen, and reliably erases the image on the screen. The purpose of the present invention is to provide a simple electronic blackboard device.

According to a fifth aspect of the present invention, at least the blade member or the blade member of the image erasing means is disposed in two or more stages along the moving direction of the screen, so that the first blade member or the blade member removes the blade member or the blade member. Even if the unremoved image forming substance remains on the screen, the image forming substance on the screen is more reliably removed by the second or subsequent blade member or blade member, and the moving speed of the screen is increased. Even in such a case, an object of the present invention is to provide an electronic blackboard device capable of appropriately removing an image forming substance on a screen.

According to a sixth aspect of the present invention, there is further provided a smoothing processing means for smoothing the surface of the screen from which an image has been erased by the image erasing means, so that the image erasing means can be damaged. It is an object of the present invention to provide an electronic blackboard device capable of improving the image quality of an image drawn on the screen by restoring the smoothness of the surface of the screen by the smoothing processing means.

[0017]

According to a first aspect of the present invention, there is provided an electronic blackboard apparatus, comprising: a screen provided so as to be movable by a predetermined amount in a predetermined direction; and a predetermined image forming material on the screen by a predetermined drawing method. An electronic blackboard device comprising: an image drawing unit that draws an image according to an image drawing unit; and an image erasing unit that erases an image drawn on the screen by handwriting. Having a roller-shaped blade member having a blade, at the time of erasing the image, the blade member is brought into contact with the screen, and at the contact position with the screen, the blade member is moved at a speed different from the moving speed of the screen. The object is achieved by rotating and removing the image forming substance of the image drawn on the screen.

According to the above arrangement, the image erasing means for erasing the image on the screen has a roller-shaped blade member having a helical blade, and when the image is erased, the blade member is brought into contact with the screen. Since the blade member is rotated at a speed different from the moving speed of the screen at a contact position with the screen to remove an image forming substance of an image drawn on the screen,
Even if an image with sufficiently strong adhesion is drawn by an image drawing mechanism using electrostatic recording using toner or ink jet recording using hot melt ink, image formation drawn on the screen properly and reliably The substance can be removed, and the image on the screen can be reliably erased.

In this case, for example, as described in claim 2, the image erasing means includes a blade cleaning means for removing at least the image forming substance adhered to the spiral blade among the blade members. Further, it may be provided.

According to the above construction, the image erasing means is provided with the blade cleaning means for removing at least the image forming substance adhered to the spiral blade among the blade members.
The image forming substance adhered to the blade member is removed, the blade member is always cleaned, and the ability of removing the image forming substance on the screen can be improved by the blade member.
It is possible to prevent the image forming substance from re-adhering to the screen from the blade member, and it is possible to more appropriately and surely erase the image drawn on the screen.

Further, for example, the blade edge cleaning means may be a brush member made of resin or metal.

According to the above configuration, since the brush member made of resin or metal is used as the blade edge cleaning means, the image forming substance attached to the blade member is removed.
The blade member is always cleaned, and the ability of removing the image forming substance on the screen can be further improved by the blade member, and the re-adhesion of the image forming substance from the blade member to the screen can be prevented. More appropriate,
In addition, the image drawn on the screen can be surely erased.

According to a fourth aspect of the present invention, there is provided an electronic blackboard device, wherein a screen is provided so as to be movable by a predetermined amount in a predetermined direction, and an image for drawing an image on the screen by a predetermined drawing method using a predetermined image forming substance. In an electronic blackboard device, comprising: a drawing unit; and an image erasing unit that erases an image drawn on the screen by the image drawing unit and the handwriting, wherein the image erasing unit is arranged in a direction perpendicular to a moving direction of the screen. A blade member formed of a metal or a resin, the blade member being brought into contact with the screen at the time of erasing the image, and the blade member having a predetermined size in a moving direction and a non-moving direction of the screen. By vibrating at a predetermined frequency and removing the image forming substance of the image drawn on the screen, It has achieved the objective.

According to the above construction, the image erasing means for erasing the image on the screen has a blade member which is disposed at right angles to the moving direction of the screen and is made of metal or resin. The blade member is brought into contact with the screen, and the blade member is vibrated at a predetermined frequency and a predetermined frequency in a moving direction and a counter moving direction of the screen to remove an image forming substance of an image drawn on the screen. Therefore, even if an image having a sufficiently strong adhesive force is drawn by an image drawing mechanism using electrostatic recording using toner or ink jet recording using hot melt ink, it is appropriate with a simple configuration, and The image-forming substance drawn on the screen can be reliably removed, and the vibration of the image-forming substance to the blade due to vibration can be ensured. Can can be prevented to the reattachment of the screen of the image forming substance prevent the image on the screen can be erased reliably.

In each of the above cases, for example, as set forth in claim 5, in the image erasing means, at least the blade member or the blade member is provided in two or more stages along the moving direction of the screen. You may.

According to the above arrangement, at least the blade member or the blade member of the image erasing means is disposed in two or more stages along the moving direction of the screen, so that the first stage blade member or the blade member removes the blade member or the blade member. Even if the unremoved image forming substance remains on the screen, the image forming substance on the screen can be more reliably removed by the blade member or blade member of the second or subsequent stage,
Even when the moving speed of the screen is increased, the image forming substance on the screen can be appropriately removed.

Further, for example, as set forth in claim 6, the electronic blackboard device further includes a smoothing processing means for smoothing the surface of the screen from which the image has been erased by the image erasing means. You may.

According to the above arrangement, since the smoothing processing means for smoothing the surface of the screen from which the image has been erased by the image erasing means is further provided, the image is damaged when the image is erased by the image erasing means. The smoothness of the screen surface can be restored by the smoothing processing means, and the image quality of the image drawn on the screen can be improved.

[0029]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 to 6 are views showing a first embodiment of the electronic blackboard device of the present invention, and FIG. 1 is an electronic blackboard device to which the first embodiment of the electronic blackboard device of the present invention is applied. Blackboard device 1
FIG.

In this embodiment, a blade member having a spiral blade is provided in the image erasing mechanism, and the blade member is cleaned by a blade cleaning member. Is what you do.

In FIG. 1, the electronic blackboard device 1 is provided with a window 2a formed in a main body casing 2 and a screen 3 facing the window 2a. The body housing 2 is provided with a copy mechanism unit 4, an operation panel 5, and the like, and the copy mechanism unit 4 is provided with a copy outlet 4a.

The copy mechanism 4 takes in the image drawn on the screen 3, copies the image on a recording sheet, and discharges the recording sheet on which the image is recorded from the copy discharge port 4a.

The operation panel 5 is provided with buttons 5a for performing various operations using the electronic blackboard device 1.
Causes the electronic whiteboard device 1 to perform various operations.

In the main body housing 2 of the electronic blackboard device 1, FIG.
As shown in FIG. 2 which is a sectional view taken along the line AA of FIG. 2, the screen 3 and the driving roller 1 on which the screen 3 is stretched.
0, 2 driven rollers 11, 12 and tension roller 1
3, an image erasing mechanism (image erasing means) 14, an image drawing mechanism (image drawing means) 15, a control unit 16, and the like are housed. The electronic blackboard device 1 is connected to a personal computer (not shown), though not shown. An interface for inputting image data from a computer or the like, an interface connected to an external printer and outputting image data to the external printer, and the like are provided. As the external printer, a conventionally known printer such as a thermal printer, a laser printer, or an ink jet printer can be connected and used.

The screen 3 is formed in a ring shape having a length capable of simultaneously forming an image for four surfaces, that is, an image for four surfaces of the window 2a.
As described above, the driving roller 10, the driven rollers 11, 12
And the tension roller 13. The driving roller 10 is driven to rotate by a motor (not shown) or the like, and moves (conveys) the screen 3 upward and downward in accordance with the rotation direction. The driven rollers 11 and 12 move by the rotation of the driving roller 10. The screen 3 is guided according to the rotation of the screen 3 to be performed. The tension roller 13 applies a predetermined force upward in FIG. 2 by a tensioner (not shown) to apply a predetermined tension to the screen 3. Although not used in the electronic blackboard device 1 of the present embodiment, a tracking roller may be provided to prevent the screen 3 from being biased.

The image drawing mechanism 15 is disposed close to the surface of the screen 3 at the drive roller 10 and draws an image on the screen 3 by, for example, an ink jet printing method using hot melt ink. The image drawing mechanism 15 is not limited to the ink jet printing method, and various types of conventionally used methods can be used.

The image erasing mechanism 14 is disposed in the vicinity of the surface of the screen 3 at the driving roller 10 portion, and a blade member 21 and a blade edge cleaning member (blade cleaning means) 22 are provided in a box-shaped case 20. Are stored, and a collection container 23 is detachably attached to the lower end of the case 20. The blade member 21 is rotatably supported by a holding mechanism (not shown), and is disposed so as to be detachably attached to the screen 3. When the image on the screen 3 is erased, the holding mechanism is Is moved to a position where the screen 3 comes into contact with the screen 3, and is rotated by a motor or the like (not shown) in a moving direction of the screen 3 at a speed different from the moving speed of the screen 3.
4 and remove the image. The rotating direction of the blade member 21 may be opposite to the moving direction of the screen 3, and in this case, the rotating speed may be the same as the moving speed of the screen 3, or may be a different rotating speed. It may be.

The blade cleaning member 22 includes the blade member 2.
When the blade member 21 is rotated, the image forming substance 24 attached to the blade member 21 is removed by rotating the blade member 21. . As the blade edge cleaning member 22, for example, a resin brush, a metal brush, a nylon brush, or the like can be used.

The blade cleaning member 22 may be formed in a cylindrical shape, and may be rotationally driven by a motor or the like at a predetermined speed in a direction following the rotation of the blade member 21, or may be rotated in the opposite direction to the rotation of the blade member 21. It may be driven to rotate in the direction,
Alternatively, a predetermined load may be applied to the rotation without rotating by a motor or the like, and the blade member 21 may rotate with the rotation.

The blade member 21 is shown in FIGS.
As shown in FIG. 5 which is a sectional view taken in the direction of the arrow B, a spring material (blade) 32 is spirally disposed on the outer peripheral surface of a cylindrical cored bar 31 to which a shaft 30 is attached. After being spirally wound around the outer peripheral surface of the cored bar 31 and fixed to the cored bar 31 by welding, in order to improve durability, a quenching process is performed, and a polishing process of the cutting edge is further performed. ing.

The control section 16 controls each section of the electronic whiteboard apparatus 1 to perform processing as the electronic whiteboard apparatus 1.

Next, the operation of the present embodiment will be described. The electronic blackboard device 1 includes an image forming substance 24 of an image drawn on the screen 3 by the rotating spiral blade member 21.
Is removed, and the image on the screen 3 is erased.

That is, the electronic blackboard device 1 can draw an image on the screen 3 by handwriting or using the image drawing mechanism 15 when it is used in a meeting or the like. The image can be appropriately erased by the image erasing mechanism 14.

The image drawing process and the image erasing process by the electronic blackboard device 1 are performed according to the procedure shown in FIG.
That is, when an image is drawn using the image drawing mechanism 15, image data is input from a personal computer or the like via an interface (step S1).
The input of the image data to the electronic blackboard device 1 is, for example,
The operation can be performed in the same manner as when an image is recorded and output from a personal computer or the like to a normal printer. For example, the electronic blackboard device 1 is designated from application software of a personal computer in which a printer driver for the electronic blackboard device 1 is incorporated. By performing a printout operation of image data such as a document, a table, or a graph, the image data can be input to the electronic blackboard device 1.

When the image data is input, the electronic blackboard device 1 stores the image data in the internal memory of the control section 16 and then drives the drive roller 10 to rotate by a motor, and An erasing process for erasing the screen area for drawing the input image data by the image erasing mechanism 14 is performed (step S2). However, the electronic blackboard device 1 omits this erasing process when the image of the input image data is overwritten on the previously drawn image.

Next, the electronic blackboard device 1 includes the image drawing mechanism 1
5 is driven to draw an image on the screen 3 based on the input image data in the screen area of the screen 3 erased by the image erasing process, in parallel with the image erasing process (automatic image drawing). ) (Step S3). The image drawn on the screen 3 in this manner is used as a material for a meeting, etc., and in this meeting, the user of the electronic blackboard device 1 draws an image on the screen 3 by handwriting as necessary. Then, the image drawn on the screen 3 is manually deleted (step S4).

The electronic blackboard apparatus 1 sequentially performs the input processing of the image data, the image drawing processing, the image erasing processing, and the moving processing of the screen 3 in accordance with the operation of the button 5a of the operation panel 5, and as necessary, The image drawn on the screen 3 is recorded on recording paper by the copy mechanism unit 4, or is output to an external printer connected to the interface, and the image is recorded and output by the external printer (step S5).

When the conference is over, the operation panel 5
Is operated by operating the button 5a, the electronic blackboard apparatus 1 drives the image erasing mechanism 14 to erase all images on the screen 3 by the image erasing mechanism 14 (step S2). , And the process ends.

As described above, the image erasing mechanism 14
In the case 20, a blade member 21 and a blade cleaning member 22 are housed, and a collection container 23 is attached to a lower end of the case 20.
In erasing an image, the image erasing mechanism 14 rotates the blade member 21 in the same direction as the transport direction of the screen 3 at a speed different from the transport speed of the screen 3 while moving the screen 3 at a predetermined transport speed when erasing the image. At the same time, the drive roller 10 contacts the screen 3 surface. Therefore,
The image erasing mechanism 14 can surely scrape the image forming substance 24 of the image drawn on the surface of the screen 3 by the rotating blade member 21, reliably erase the image on the screen 3, and clean the screen 3. be able to.

The blade member 21 is always or timely contacted with the blade cleaning member 22 so that the blade member 2
In 1, the image forming substance 24 attached to the blade member 21 is removed and cleaned by the blade edge cleaning member 22, and the image forming substance 24 is prevented from re-adhering to the screen 3 from the blade member 21. Therefore, the image erasing mechanism 14 can further clean the screen 3.

Further, the erasing function unit 14 includes a case 20 in which a blade member 21 and a blade cleaning member 22 are housed, and a collection container 23 is provided at a lower end of the case 20.
Is detachably attached, it is possible to prevent the image forming substance 24 removed from the screen 3 from being scattered, and to prevent the image forming substance 24
Is stored in the collection container 23, and the collection container 23 is
It can be easily processed by removing it from.

FIG. 7 is a diagram showing a second embodiment of the electronic blackboard device of the present invention according to the present invention. FIG. 7 is an electronic blackboard device to which the second embodiment of the electronic blackboard device of the present invention is applied. FIG. 3 is a front sectional view of an image erasing mechanism of the blackboard device 40.

In this embodiment, the image erasing mechanism is provided with a blade member, and corresponds to the fourth aspect.

The present embodiment is applied to the same electronic blackboard device as the first embodiment, and in the description of the present embodiment, the same as the first embodiment is applied. The same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 7, an electronic blackboard device 40 has an image erasing mechanism 41 disposed in a state of being close to the surface of the screen 3 at the drive roller 10 portion.
2, a blade member 43 is disposed close to the screen 3. The blade member 43 is disposed so as to be detachable from the screen 3 by a holding mechanism (not shown), and moves to a position where the blade mechanism 43 comes into contact with the screen 3 by the holding mechanism when erasing an image on the screen 3. At the same time, the screen 3 is vibrated at a predetermined frequency, for example, 50 Hz in the transport direction and the reverse transport direction, and the image forming substance 24 of the image drawn on the screen 3 is scraped off to remove the image. . Blade member 43
Is made of metal or resin.

At the lower end of the case 42, a collecting container 44 for accommodating the image forming substance 24 scraped off from the screen 3 by the blade member 43 is detachably attached.

In the electronic blackboard device 40 of the present embodiment, a blade member 43 is disposed on the image erasing mechanism 41, and the blade member 43 is held by the holding mechanism, and is attached to the screen 3 when erasing an image. At the same time, the screen 3 is vibrated while being brought into contact with the screen 3 with a vibration of a predetermined size and a predetermined frequency in the moving direction and the anti-moving direction of the screen 3.

Therefore, the image forming substance 2 of the image formed on the screen 3 by the vibrating blade member 43
4 is efficiently and reliably scraped off, and the screen 3
Can be cleaned, and the image forming substance 24 adhered to the blade member 43 due to the vibration can be removed from the blade member 43 to prevent the image forming substance 24 from re-adhering to the screen 3.

FIG. 8 is a diagram showing a third embodiment of the electronic blackboard device of the present invention according to the present invention, and FIG. 1 is an electronic blackboard device to which the third embodiment of the electronic blackboard device of the present invention is applied. FIG. 4 is a front sectional view of an image erasing mechanism of the blackboard device 50.

In this embodiment, the image erasing mechanism is provided with a blade member and a blade cleaning member in two stages.
It corresponds to.

The present embodiment is applied to the same electronic blackboard device as the first embodiment, and in the description of the present embodiment, the same as the first embodiment will be described. The same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 8, an electronic blackboard device 50 has an image erasing mechanism 51 disposed in a state of being close to the surface of the screen 3 at the drive roller 10 portion.
2, two blade members 53 and 54 are arranged in the moving direction of the screen 3 and close to the screen 3. These blade members 53 and 54 are rotatably supported by holding mechanisms (not shown), respectively.
When the image on the screen 3 is erased, the screen 3 is moved to a position where the screen 3 is in contact with the screen 3 when the image on the screen 3 is erased. Is rotationally driven in the moving direction of the screen 3 at a speed different from the moving speed of the
And erase the image. The blade members 53, 5
The rotation direction of the screen 4 may be opposite to the movement direction of the screen 3, and in this case, the rotation speed may be the same as the movement speed of the screen 3 or may be a different rotation speed. Good.

Although not shown in detail, the blade members 53 and 54 are similar to the blade member 21 of the first embodiment.
A spring material is spirally arranged on the outer peripheral surface of the cylindrical core bar with the shaft attached, and the spring material is spirally wound around the outer peripheral surface of the core bar and fixed to the core bar by welding. After that, in order to improve durability, a quenching process is performed, and further, a polishing process of the cutting edge is performed.

The blade members 53 and 54 are provided with blade edge cleaning members 55 and 56, respectively, which are always in contact with the blade members 53 and 54 or in a timely contact state. The blade members 53, 54 are rotated to rotate the blade members 53, 54.
In contact with the blade member 54, the image forming substance 24 attached to the blade members 53 and 54 is removed. Blade edge cleaning members 55, 5
As 6, for example, a resin brush, a metal brush, a nylon brush, or the like can be used.

These blade edge cleaning members 55 and 56
Is formed in a cylindrical shape, and the blade member 5 is driven by a motor or the like.
It may be driven to rotate at a predetermined speed in a direction following the rotation of 3, 54, may be driven to rotate in the opposite direction to the rotation of the blade members 53, 54, and without being rotated by a motor or the like, By applying a predetermined load to the rotation, the blade member 2
You may make it rotate with 1 rotation.

At the lower end of the case 52, a blade member 53,
Image forming substance 2 scraped off from screen 3 at 54
The collection container 57 for accommodating the container 4 is detachably attached.

In the electronic blackboard device 50 of this embodiment, the image erasing mechanism 51 includes a blade member 53 and a blade cleaning member 55 and a blade member 54 and a blade cleaning member 56.
Are formed in two stages along the screen 3, so that the image forming substance 2 that cannot be completely removed by the first-stage blade member 53.
Even if 4 remains on the screen 3, the second-stage blade member 5
4, the image forming substance 24 on the screen 3 can be more reliably removed, and even when the moving speed of the screen 3 is increased, the image forming substance 24 on the screen 3 can be appropriately removed. it can.

FIG. 9 is a diagram showing a fourth embodiment of the electronic blackboard device of the present invention according to the present invention. FIG. 9 is an electronic blackboard device to which the fourth embodiment of the electronic blackboard device of the present invention is applied. FIG. 4 is a front sectional view of an image erasing mechanism of the blackboard device 60.

In this embodiment, the image erasing mechanism is provided with a smoothing member for smoothing the surface of the screen from which the image has been erased.

This embodiment is applied to the same electronic blackboard device as the first embodiment, and in the description of the present embodiment, the same as the first embodiment is applied. The same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 9, an electronic blackboard device 60 has an image erasing mechanism 61 disposed in a state of being close to the surface of the screen 3 at the driving roller 10 portion.
2, a blade member 21, a blade cleaning member 22, and a smoothing mechanism (smoothing processing means) 63 are housed, and a collection container 23 is detachably attached to a lower end of the case 62.

The blade member 21 and the blade edge cleaning member 2
2 has the same configuration as that of the first embodiment.

The smoothing mechanism 63 is provided with a predetermined smoothing member 65 suitable for flattening and smoothing the surface of the screen 3 on the surface of the cylindrical member 64. It is possible to use felt-like nonwoven fabric, woven fabric of cotton, aramid, etc., buff-like abrasive material in which abrasive material is mixed in these nonwoven fabric or woven fabric, rubber material in which abrasive material is mixed, resin material, synthetic whetstone, etc. it can.

The smoothing mechanism 63 is provided in a state where the smoothing member 65 is held by the predetermined holding mechanism (not shown) via the tubular member 64 so as to be detachable from the screen 3. When the image is erased, that is, when the image is erased, the holding mechanism moves the smoothing member 65 to a position where it contacts the screen 3 and rotates the screen 3 in the moving direction of the screen 3 at a speed different from the moving speed of the screen 3 by a motor (not shown). It is driven to smooth the surface of the screen 3. Note that the rotation direction of the smoothing member 65 may be opposite to the movement direction of the screen 3. In this case, the rotation speed may be the same as the movement speed of the screen 3, or may be a different rotation speed. It may be speed.

In the electronic blackboard device 60 of the present embodiment, an image erasing mechanism 61 is provided with a smoothing mechanism 63, and the surface of the screen 3 from which the image forming substance 24 has been removed by the blade member 21. Smoothing member 6 of smoothing mechanism 63
5 and the image erasing mechanism 4
The image forming substance 2 that could not be completely removed by the first blade member 21
4 can be removed from the screen 3. .

Therefore, the screen 3 can be cleaned even more cleanly, and the surface of the screen 3 can be constantly smoothed, so that the quality of the image formed on the screen 3 by the image drawing mechanism 15 can be improved. .

In the present embodiment, the smoothing mechanism 63 is provided inside the image erasing mechanism 61. However, the smoothing mechanism 63 is provided outside the case 62 of the image erasing mechanism 61. Is also good.

In the present embodiment, the present invention is applied to the case where the image erasing mechanism 61 has the blade member 21. However, the present invention is similarly applied to the case where the image erasing mechanism 61 has the blade member. can do. <Experimental Example 1> Using the electronic blackboard device 1 of the first embodiment, image drawing by the image drawing mechanism 15 and image deletion by the image deletion mechanism 14 were performed. The experimental conditions of each part of the electronic blackboard device 1 are as follows.

Material of screen 3: Titanium oxide dispersed polyethylene terephthalate (surface hard coat) Image drawing mechanism 15: Ink jet printing method (hot melt ink) Transfer speed of screen 3: 20 mm / sec Image erasing mechanism 14: Blade member 21 Rotate at 400 rpm Under the above conditions, screen 3
After a predetermined image was drawn on the screen 3, the image was erased by the image erasing mechanism 14. As a result, the screen 3 was reproduced in a state comparable to the state before the processing.

The same image drawing is performed again by the image drawing mechanism 15.
As a result, an image similar to the image before the first processing could be obtained, although some deterioration of the image considered to be caused by unevenness of the surface of the screen 3 was observed.

Further, after the image on the screen 3 was erased by the image erasing mechanism 14, the image drawing by the image drawing mechanism 15 and the image erasing by the image erasing mechanism 14 were repeated five times. The formed image has exactly the same image quality as the image formed the second time, and the state of the screen 3 erased by the image erasing mechanism 14 after the second time is such that the image is erased by the first image erasure. The image erasure quality was exactly the same as the state of the screen 3 when erased. <Comparative Experimental Example 1> Instead of the blade member 21 of the image erasing mechanism 14 of the electronic blackboard device 1 of the first embodiment, the surface is made of felt used for erasing an image with a conventional electronic blackboard device. An image is drawn on the screen 3 by the image drawing mechanism 15 under the same conditions as those of the experimental example 1 except that the covered roller is provided, and the screen is removed by the image erasing mechanism 14 provided with the felt roller. 3 was erased.

As a result of the experiment, the hot melt ink as an image forming substance was partially removed, but most of the hot melt ink remained on the screen 3 without being removed, and it was necessary to form an image on the screen 3 again. It was not ready for use.

From the experimental results, the effectiveness of the image erasing mechanism 14 using the blade member 21 was confirmed as compared with the conventional image erasing mechanism. <Experimental Example 2> Using the electronic blackboard device 1 of Experimental Example 1, an image is drawn on the screen 3 by the image drawing mechanism 15 and the image on the screen 3 is deleted by the image deletion mechanism 14. , The image erasing mechanism 14
The blade member 21 is separated from the screen 3 and the rotation speed is set to 1
/ 40 (10 rpm), and cleaning was performed by the blade edge cleaning member 22. As the blade cleaning member 22, a nylon brush is used, and as shown in FIG. 10, the rotation direction of the blade member 21 and the blade cleaning member 22 is the same as the rotation direction of the mutual contact portion, that is, the rotation direction. When the blade member 21 rotates counterclockwise, the blade edge cleaning member 22 rotates clockwise.

Under the above conditions, an image is drawn on the screen 3 by the image drawing mechanism 15, the image on the screen 3 is deleted by the image erasing mechanism 14, and the blade member 21 is cleaned by the blade cleaning member 22. When the processing is performed 20 times in succession, the image on the screen 3 can be properly and reliably erased, and an image with good image quality can be drawn on the screen 3 after the image is erased. Was completed. Further, the blade member 2
There was no problem that the hot melt ink as the image forming substance was raised and adhered to the spring member 32 as the first blade.

The blade cleaning member 22 is
When the same experiment was performed by changing the nylon brush to a stainless steel (SUS) brush, the same effect as described above could be obtained. <Comparative Experimental Example 2> Electronic blackboard device 1 similar to Experimental Example 2 above
Is used to draw an image on the screen 3 by the image drawing mechanism 15, and the image on the screen 3 is deleted by the image erasing mechanism 14.
Without performing the cleaning process of the blade member 21 by the above, the process of drawing the next image was continuously performed 20 times.

As a result of the experiment, initially, the image erasing mechanism 1
Although the image erasing by No. 4 was performed favorably, the erasability of the image deteriorated after repeating the above-mentioned process ten and several times.

When the blade member 21 of the image erasing mechanism 14 was examined after this experiment, it was found that hot melt ink as an image forming substance was sticking to the outer peripheral portion of the blade member 21, especially the spring material 32. Part of the melt ink was raised and attached to the outer peripheral portion of the blade member 21.

According to this experiment, the blade cleaning member 2
2, the effectiveness of the blade member 21 was confirmed. <Comparative Experimental Example 3> Electronic blackboard device 1 similar to Experimental Example 2 above
The blade cleaning member 22 of the image erasing mechanism 14 is replaced with a felt roller, and the image drawing on the screen 3 by the image drawing mechanism 15 and the image erasing by the image erasing mechanism 14 are continuously performed 20 times in the same manner as in Experimental Example 2. An experiment was performed.

As a result of the experiment, there was some adhesion of the image forming substance on the screen 3 after the image was erased by the image erasing mechanism 14, and the erasability was deteriorated.

After this experiment, the felt roller, which is the blade cleaning member of the image erasing mechanism 14, was observed. As a result, hot melt ink, which was an image forming substance transferred from the blade member 21, was stuck.
Seemed to have a reverse metastasis. This is because if a brush member is used as the blade cleaning member, the blade member 21
It is thought that the use of a felt member wipes the surface of the blade member 21 and deposits the wiped image forming material on the felt member.

From this comparative experiment, it was confirmed that a resin or metal brush member was suitable as the blade cleaning member. <Experimental example 3> The electronic blackboard device 40 of the second embodiment.
Is used to draw an image on the screen 3 by the image drawing mechanism 15, and the image on the screen 3 is moved by the image erasing mechanism 41 having the blade member 43 so that the blade member 43 is moved in the transport direction of the screen 3. The image was erased while being vibrated at a frequency of 50 Hz in the anti-transport direction, and an image was drawn on the screen 3 again by the image drawing mechanism 15.

As a result of the experiment, although the image was considered to be slightly deteriorated due to the unevenness of the surface of the screen 3, an image having the same image quality as the initially drawn image could be drawn on the screen 3. Was.

Further, after the image on the screen 3 was erased by the image erasing mechanism 41, the image drawing by the image drawing mechanism 15 and the image erasing by the image erasing mechanism 41 were repeated five times. The formed image has exactly the same image quality as the image formed the second time, and the state of the screen 3 erased by the image erasing mechanism 41 from the second time onward is such that the image is erased by the first image erasure. The image erasure quality was exactly the same as the state of the screen 3 when erased. <Comparative Experimental Example 4> An electronic blackboard device 4 similar to that of Experimental Example 3 above.
A comparative experiment similar to the experimental example 3 was performed in a state where the vibration of the blade member 43 of the image erasing mechanism 41 was stopped using 0.

As a result of the experiment, there was some adhesion of the image forming substance on the screen 3 after the image was formed by the image erasing mechanism 41, and the image erasability was deteriorated.

This comparative experiment confirms that in the image erasing mechanism 41 using the blade member 43, it is effective to vibrate the blade member 43 in removing the image forming substance on the screen 3. I was able to. <Experimental Example 4> The electronic blackboard device 50 of the third embodiment.
Is used to draw an image on the screen 3 by the image drawing mechanism 15, and the image on the screen 3 is
The image was erased by the image erasing mechanism 51 provided with the blade members 53 and 54 and the blade cleaning members 55 and 56 provided in two stages, and the image was drawn on the screen 3 again by the image drawing mechanism 15.

As a result of the experiment, although some deterioration of the image considered to be caused by the unevenness of the surface of the screen 3 was observed, an image having the same image quality as the initially drawn image could be drawn on the screen 3. Was.

Further, after the image on the screen 3 is erased by the image erasing mechanism 51, the image drawing by the image drawing mechanism 15 and the erasing of the image by the image erasing mechanism 51 are performed at the moving speed (transport speed) of the screen 3. When the test was repeated five times, which was higher than in the case of Experimental Example 1, the images formed after the second time had exactly the same image quality as the images formed the second time, and the images formed after the second time The state of the screen 3 erased by the erasing mechanism 41 is the screen 3 when the image is erased by the first image erasure.
The image erasing quality was exactly the same as in the condition (1).

From the experimental results, it can be seen that by providing the blade members 53 and 54 in two stages, the efficiency of removing the image forming substance can be improved, and the image forming substance can be properly removed even when the conveying speed of the screen 3 is increased. Could be confirmed.

Although the invention made by the inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention. It goes without saying that it is possible.

[0101]

According to the electronic blackboard device of the present invention, the image erasing means for erasing the image on the screen is provided by:
A roller-shaped blade member having a helical blade, the blade member is brought into contact with the screen when erasing an image, and the blade member is moved at a speed different from the moving speed of the screen at a contact position with the screen. Is rotated to remove the image forming substance of the image drawn on the screen, so that an image drawing mechanism using electrostatic recording using toner or ink jet recording using hot melt ink or the like is used. Even if an image having a sufficiently high adhesive force is drawn, the image forming substance drawn on the screen can be appropriately and reliably removed, and the image on the screen can be surely erased.

According to the electronic blackboard device of the second aspect of the present invention, the image erasing means is provided with the blade cleaning means for removing at least the image forming substance attached to the spiral blade among the blade members. By removing the image-forming substance adhered to the member, the blade member can be constantly cleaned, the blade member can improve the ability to remove the image-forming substance on the screen, and the re-use of the image-forming substance from the blade member to the screen. Adhesion can be prevented, and an image drawn on the screen can be more appropriately and reliably erased.

According to the electronic blackboard device of the third aspect of the present invention, since the brush member made of resin or metal is used as the blade edge cleaning means, the image forming substance adhered to the blade member is removed, and the blade member is cleaned. And the blade member can further improve the ability to remove the image-forming substance on the screen, and the blade member can prevent the image-forming substance from re-adhering to the screen. In addition, the image drawn on the screen can be surely erased.

According to the electronic blackboard device of the fourth aspect of the present invention, the image erasing means for erasing the image on the screen is provided by a blade member which is disposed at right angles to the moving direction of the screen and is made of metal or resin. When erasing the image,
While bringing the blade member into contact with the screen,
The blade member is vibrated at a predetermined size and a predetermined frequency in a moving direction and a counter-moving direction of the screen to remove an image forming substance of an image drawn on the screen. Even if an image with sufficiently strong adhesive force is drawn by an image drawing mechanism using electrostatic recording or ink jet recording using hot melt ink, the image drawn on the screen with a simple structure is appropriate and reliable. Forming substances can be removed,
The vibration can prevent the image forming substance from sticking to the blade, prevent the image forming substance from re-adhering to the screen, and can surely erase the image on the screen.

According to the electronic blackboard device of the present invention, at least the blade member or the blade member of the image erasing means is arranged in two or more stages along the moving direction of the screen. Even if the image forming substance that cannot be completely removed by the blade member or the blade member remains on the screen, the image forming substance on the screen can be more reliably removed by the second and subsequent blade members or blade members. In addition, even when the moving speed of the screen is increased, the image forming substance on the screen can be appropriately removed.

According to the electronic blackboard device of the present invention, the smoothing processing means for smoothing the surface of the screen from which the image has been erased by the image erasing means is further provided. The smoothness of the surface of the screen, which has been damaged at the time of image erasure, can be restored by the smoothing processing means, and the image quality of the image drawn on the screen can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of an electronic blackboard device to which a first embodiment of the electronic blackboard device of the present invention is applied.

FIG. 2 is a cross-sectional view of the electronic blackboard device of FIG.

FIG. 3 is an enlarged front sectional view of an image erasing mechanism of the electronic blackboard device of FIG. 2;

FIG. 4 is an enlarged front view of a blade member of the image erasing mechanism of FIG. 3;

FIG. 5 is a cross-sectional view of the blade member of FIG.

FIG. 6 is a diagram showing a procedure of an image drawing process and an image erasing process by the electronic whiteboard device of FIG. 1;

FIG. 7 is an enlarged front sectional view of an image erasing mechanism of an electronic blackboard device to which a second embodiment of the electronic blackboard device of the present invention is applied.

FIG. 8 is an enlarged front cross-sectional view of an image erasing mechanism of an electronic blackboard device to which a third embodiment of the electronic blackboard device of the present invention is applied.

FIG. 9 is an enlarged front cross-sectional view of an image erasing mechanism of an electronic blackboard device to which a fourth embodiment of the electronic blackboard device of the present invention is applied.

FIG. 10 is a side view of the blade member and the blade cleaning member showing the rotation direction of the blade member and the blade cleaning member when the blade member of the image erasing mechanism is cleaned by the blade cleaning member in Experimental Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic blackboard device 2 Main body case 2a Window 3 Screen 4 Copy mechanism 4a Copy discharge port 5 Operation panel 10 Drive roller 11, 12 Follower roller 13 Tension roller 14 Image erasing mechanism 15 Image drawing mechanism 16 Control unit 20 Case 21 Cutting tool Member 22 Blade cleaning member 23 Collection container 24 Image forming substance 30 Shaft 31 Core bar 32 Spring material 40 Electronic blackboard device 41 Image erasing mechanism 42 Case 43 Blade member 50 Electronic blackboard device 51 Image erasing mechanism 52 Case 53, 54 Blade member 55, 56 Blade edge cleaning member 57 Collection container 60 Electronic blackboard device 61 Image erasing mechanism 62 Case 63 Smoothing mechanism 64 Cylindrical member 65 Smoothing member

Claims (6)

[Claims] 1. A screen arranged to be movable by a predetermined amount in a predetermined direction, an image drawing means for drawing an image on the screen by a predetermined image forming material by a predetermined drawing method,
An electronic blackboard device comprising the image drawing means and an image erasing means for erasing an image drawn on the screen by handwriting, wherein the image erasing means has a roller-shaped blade member having a spiral blade. Then, at the time of erasing the image, the blade member is brought into contact with the screen, and the blade member is rotationally driven at a speed different from the moving speed of the screen at a contact position with the screen, so that the blade member is placed on the screen. An electronic blackboard device, wherein the image forming substance of the drawn image is removed. 2. The apparatus according to claim 1, wherein said image erasing means further comprises a blade cleaning means for removing at least said image forming substance adhered to said spiral blade among said blade members. Electronic blackboard device. 3. The electronic blackboard device according to claim 2, wherein said blade edge cleaning means is a brush member made of resin or metal. 4. A screen provided so as to be movable by a predetermined amount in a predetermined direction, and image drawing means for drawing an image on the screen by a predetermined drawing method using a predetermined image forming substance.
An electronic blackboard device comprising the image drawing means and an image erasing means for erasing an image drawn on the screen by handwriting, wherein the image erasing means is disposed in a direction perpendicular to the moving direction of the screen and is made of metal. Or it has a blade member formed of resin, and at the time of erasing the image, the blade member is brought into contact with the screen, and the blade member has a predetermined size and a predetermined size in a moving direction and a counter moving direction of the screen. An electronic blackboard device, wherein the image forming substance of the image drawn on the screen is removed by vibrating at a frequency. 5. The image erasing means according to claim 1, wherein at least the blade member or the blade member is arranged in two or more stages along a moving direction of the screen. The electronic blackboard device according to any one of the above. 6. The electronic blackboard device according to claim 1, further comprising a smoothing processing means for smoothing a surface of said screen from which said image has been erased by said image erasing means. 6. The electronic blackboard device according to any one of 5.